Wednesday, November 28, 2012

Orion the hunter

Orion can be easily seen in the night sky from November to Feburuary of each year-late Autumn to winter in the northen hemisphere late spring to summer to the southen hemisphere .In the tropics
(less than about 8o from equater) the constellation transits at the zenith. In the period may-july (summer in the northen hemisphere, winter in the southen hemisphere)Orion is in daytime sky and thus not visible at most latitades. However for much of Antarctia in the southern hemisphere winter months,the sun is below the horizon even at midday.Stars (and thus Orion) are then visible at twilight for a few hours around local noon, low in the North. At the same time of the day at the south pole itself (Amudsen-scott south pole staition), rigel is only 8o above the horizon and the belt sweeps just along it.In the southern hemisphere summer months, when orion  s normally visible in the night sky, the constellation is actually not visible in Antarctic circle.In year south of Antarctic because the sun does not set at that time of the year.by  charlotte and luke.

sirius the dog star

sirius [the dog star] is the brightest star for us in the eath. It dose not mean it is the most luminous as it appears very bright to us because it is very close to us and luminous that the other close stars it is actully a binday star system  cansisting of two stars:sirius a main sequence star,and sirius b white dwaf.canis mjor the large dog where near orin the hunter.

little bear facts

Ursa minor and ursa major were related by the greekes  to the myth of callist , and arcas. However,in a variant of the story, in which it is bootes that represents arcas .Ursa minor reprsents a dog.This is the older traditon,which semsibly explains  both the length of the tall and the obsolete alternate   name of cynosurs ( the dogs tail) for polaris, the north stara.   By quitara and sophie d

sirius the dog star